EP 2855981 A1 20150408 - METHOD FOR PRODUCING AN OIL CONTROL PISTON RING
Title (en)
METHOD FOR PRODUCING AN OIL CONTROL PISTON RING
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES ÖLABSTREIFKOLBENRINGS
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN SEGMENT DE PISTON RACLEUR D'HUILE
Publication
Application
Priority
- DE 102012010756 A 20120531
- DE 2013000226 W 20130425
Abstract (en)
[origin: WO2013178204A1] Method for producing an oil control piston ring, wherein a main part (2) is provided with a running surface profile by mechanically machining the radially outer peripheral surface of the main part, the running surface profile containing two running surface ribs (3, 4) and a groove (8) lying thereinbetween and the running surface profile corresponding to that of the finished oil control piston ring; introducing drainage bores (16) in the groove base (15) on the groove end; providing at least the running surface ribs with a wear-resistant PVD, DLC or TaC layer; and polishing, honing or lapping the wear-resistant (9, 10) layer as required.
IPC 8 full level
F16J 9/20 (2006.01)
CPC (source: EP US)
B23P 15/06 (2013.01 - US); F16J 9/20 (2013.01 - US); F16J 9/203 (2013.01 - US); F16J 9/206 (2013.01 - EP US); F16J 9/26 (2013.01 - EP US); Y10T 29/49284 (2015.01 - EP US)
Citation (search report)
See references of WO 2013178204A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2013178204 A1 20131205; WO 2013178204 A8 20140109; DE 102012010756 A1 20131205; DE 102012010756 B4 20170427; EP 2855981 A1 20150408; EP 2855981 B1 20190515; PT 2855981 T 20190830; US 2015130143 A1 20150514; US 9638321 B2 20170502
DOCDB simple family (application)
DE 2013000226 W 20130425; DE 102012010756 A 20120531; EP 13726094 A 20130425; PT 13726094 T 20130425; US 201314401946 A 20130425